implemented DeriveKeyPair

[Aurvandill]

relates to issue #9

[Aurvandill]

perhabps i should move the derive_key_pair Function from the KEM class to the corresponding KEMPrimitvesInterface (eg. EC, X25519, X448) subclass.
what's your opinion on that @dajiaji

[Aurvandill]

@dajiaji did you already have time to take a look?

[dajiaji]

Thanks for your contribution!

I'll check your PR now.

[dajiaji]

perhabps i should move the derive_key_pair Function from the KEM class to the corresponding KEMPrimitvesInterface (eg. EC, X25519, X448) subclass. what's your opinion on that @dajiaji

Thanks. I'm very happy if you could move it to the subclasses of KEPrimitivesInterface.

[Aurvandill]

ok i will move it into the KEMPrimitivesInterface and revert the version bump later today :)
thanks for taking a look

[codecov-commenter]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (bd7748a) 86.70% compared to head (feb6b1c) 87.24%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #133      +/-   ##
==========================================
+ Coverage   86.70%   87.24%   +0.54%     
==========================================
  Files          29       29              
  Lines         782      839      +57     
==========================================
+ Hits          678      732      +54     
- Misses        104      107       +3     

Files	Coverage Δ
pyhpke/kem.py	94.87% <100.00%> (+0.13%)	⬆️
pyhpke/kem_primitives/x25519.py	100.00% <100.00%> (+4.16%)	⬆️
pyhpke/kem_primitives/x448.py	100.00% <100.00%> (+4.16%)	⬆️
pyhpke/kem_primitives_interface.py	57.89% <100.00%> (+2.33%)	⬆️
pyhpke/kem_interface.py	66.66% <50.00%> (-2.09%)	⬇️
pyhpke/kem_key_interface.py	81.81% <50.00%> (-7.08%)	⬇️
pyhpke/keys/ec_key.py	70.49% <80.00%> (+0.31%)	⬆️
pyhpke/keys/x25519_key.py	81.81% <75.00%> (-0.69%)	⬇️
pyhpke/keys/x448_key.py	81.81% <75.00%> (-0.69%)	⬇️
pyhpke/kem_primitives/ec.py	88.13% <85.18%> (-0.44%)	⬇️

... and 1 file with indirect coverage changes

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[Aurvandill]

@dajiaji I'm done with the changes :)

[dajiaji]

Thanks for the great work! Approved.